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High Resolution Melting Analysis - Beyond the SNP

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Real-time qPCR using SYBR Green and melting curve analysis to verify specific product amplification has become a standard laboratory technique for rapid, high throughput gene quantification. An extension of this melting curve method – High Resolution melting analysis (HRMA)– is now doing the same for the analysis of sequence variation, allowing rapid cost-effective discrimination of sequences to SNP level in an automated closed-tube method. Two PCR primers are typically required as with SYBR Green quantification but HRMA differs in its requirement for the use of a saturating dye, precise reaction temperature control and software algorithms to cluster the melting curves.

Originally described for SNP analysis (and still the leading application), HRMA is now being used in a wider context- HLA comparisons, microsatellite genotyping and methylation status of DNA sequences. New developments such as unlabeled probes and snapback elements on the PCR primers allow the simultaneous genotyping of a desired SNP with the scanning of the whole amplicon for other sequence variation.

This presentation covers some of these developments and provides a guide to those wishing to establish this technique, as well as troubleshooting advice for those already underway.

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